Triple World Formula One Champion, Red Bull Racing's German driver Sebastian Vettel, visits the construction site of Russian Grand Prix circuit in the Black Sea resort of Sochi on April 22, 2013. Vettel attended today a special promotional event at the new Russian Grand Prix circuit in Sochi, the location for the 2014 Winter Olympic. (Photo: AFP/Getty Images)

World Champion Sebastian Vettel's Formula One car is seen at the Sochi Olympic Park and site of Russia s first Grand Prix in Sochi, Russia, Monday, April 22, 2013. Fresh from winning his third race of the season in Bahrain, Sebastian Vettel touched down in Sochi on Monday to test the Russian city's track for the 2014 Russian Grand Prix. Vettel and former star David Coulthard are to drive around the 5.9-kilometer Sochi Olympic Park Circuit, which is yet to be completed, in a regular road car. (Photo: AP)

World Champion Sebastian Vettel, second right, pose for a photos with officials while visiting the Sochi Olympic Park and site of Russia s first Grand Prix in Sochi, Russia, Monday, April 22, 2013. Fresh from winning his third race of the season in Bahrain, Sebastian Vettel touched down in Sochi on Monday to test the Russian city's track for the 2014 Russian Grand Prix. Vettel and former star David Coulthard are to whizz around the 5.9-kilometer Sochi Olympic Park Circuit, which is yet to be completed, in a regular road car. (Photo: AP)

A general view of the construction site of Russian Grand Prix circuit in the Black Sea resort of Sochi on April 22, 2013. Triple World Formula One Champion, Red Bull Racing's German driver Sebastian Vettel, attended today a special promotional event at the new Russian Grand Prix circuit in Sochi, the location for the 2014 Winter Olympic. (Photo: AFP/Getty Images)

World Champion Sebastian Vettel poses for a photo while visiting the Sochi Olympic Park and site of Russia s first Grand Prix in Sochi, Russia, Monday, April 22, 2013. Fresh from winning his third race of the season in Bahrain, Sebastian Vettel touched down in Sochi on Monday to test the Russian city's track for the 2014 Russian Grand Prix. Vettel and former star David Coulthard are to whizz around the 5.9-kilometer Sochi Olympic Park Circuit, which is yet to be completed, in a regular road car. (Photo: AP)

World Champion Sebastian Vettel poses for a photo while visiting the Sochi Olympic Park and site of Russia s first Grand Prix in Sochi, Russia, Monday, April 22, 2013. (Photo: AP)

British former Formula One racing driver from Scotland turned commentator David Coulthard attends a press conference in Rusian Black Sea resort of Sochi on April 22, 2013. Coulthard attended today a special promotional event at the new Russian Grand Prix circuit in Sochi, the location for the 2014 Winter Olympic. (Photo: AFP/Getty Images)

Triple World Formula 1 Champion, Red Bull Racing's German driver Sebastian Vettel, attends a press conference in Rusian Black Sea resort of Sochi on April 22, 2013. Vettel attended today a special promotional event at the new Russian Grand Prix circuit in Sochi, the location for the 2014 Winter Olympic. (Photo: AFP/Getty Images)

World Champion Sebastian Vettel smiles while visiting the Sochi Olympic Park and site of Russia s first Grand Prix in Sochi, Russia, Monday, April 22, 2013. (Photo: AP)

Triple World Formula 1 Champion, Red Bull Racing's German driver Sebastian Vettel, attends a press conference in Rusian Black Sea resort of Sochi on April 22, 2013. Vettel attended today a special promotional event at the new Russian Grand Prix circuit in Sochi, the location for the 2014 Winter Olympic. (Photo: AFP/Getty Images)

Sebastian Vettel at Sochi Formula One Circuit

Triple World Formula One Champion, Red Bull Racing's German driver Sebastian Vettel, visits the construction site of Russian Grand Prix circuit in the Black Sea resort of Sochi on April 22, 2013. Vettel attended today a special promotional event at the new Russian Grand Prix circuit in Sochi, the location for the 2014 Winter Olympic. (Photo: AFP/Getty Images)